40A 12V→12V Compact DC-DC Battery-to-Battery Charger with Solar Input
£70.00
Sale price
£70.00
Regular price
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40A 12V→12V Compact DC-DC Battery-to-Battery Charger with Solar Input
£70.00
Sale price
£70.00
Regular price
Shipping calculated at checkout.
DCDC-40A
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Description
40A 12V→12V DC-DC Battery-to-Battery Charger with Integrated MPPT Solar Input
This high-performance 40A DC-DC charger allows a 12V leisure or auxiliary battery to be charged from a 12V starter battery or alternator, and also features a built-in MPPT solar input for charging from solar panels when parked. Combining two charging systems in one compact, efficient unit simplifies installation and extends your off-grid runtime — ideal for campervans, motorhomes, caravans and boats.
The intelligent multi-stage charging program ensures each connected battery type receives the correct voltage and current profile for optimum life and performance. With one-button programming, advanced protections, and continued charging even under load, the DCDC-40A delivers professional-grade functionality in a user-friendly format.
Key Features
- Dual-input operation: charges from alternator or solar panel (up to 40A) with automatic input switching.
- Integrated MPPT solar controller: maximises solar efficiency and activates automatically when battery-to-battery charging is not required.
- Multi-stage smart charging: precise charging for Lead Acid, AGM, Gel, Calcium and Lithium-ion batteries for longer lifespan and performance stability.
- One-button battery type selection: quick configuration with memory retention even after power loss.
- Safe unattended operation: built-in protection against overload, overheating, over-voltage, reverse discharge and short circuit.
- Supports charging under load: powers 12V appliances while maintaining battery charge stability.
- Ignition or voltage-sensing control: automatically starts and stops charging with engine operation or based on battery voltage levels.
- Deep discharge recovery: capable of restoring batteries with output voltage as low as 2.0V.
- LED indicators: show charge stage, power source and selected battery type for clear visual feedback.
Technical Specifications
| Battery input voltage | 12.5 – 16.0 V |
| Maximum charging current | 40 A |
| Solar input voltage | 16 – 25 V |
| Maximum solar input current | 40 A |
| Minimum target battery voltage | 2.0 V (recovery) |
| Bulk charge voltage | 14.7 V (AGM/Gel), 14.4 V (Lead Acid), 15.4 V (Calcium), 14.4 V (Li-ion) |
| Float charge voltage | 13.5 V |
| Recommended battery capacity | 60 – 600 Ah |
| Dimensions (L × W × H) | 307 × 198 × 45 mm |
| Weight | 1.2 kg |
| Warranty | 1 year |
Compatibility & Installation
Suitable for any 12V battery system, including Lead Acid, AGM, Gel, Calcium and Lithium-ion types. Not compatible with 24V systems or mixed-voltage setups. Use correctly rated cabling and fuses, and ensure the charger is mounted in a ventilated location. Ignition and voltage-sensing control options make it adaptable for a wide range of vehicle and marine installations.
Documents Available
Installation and user guide available for download
Return policy
Our goal is for every customer to be totally satisfied with their purchase. If this isn't the case, let us know and we'll do our best to work with you to make it right.
Shipping
We will work quickly to ship your order as soon as possible. Once your order has shipped, you will receive an email with further information. Delivery times vary depending on your location.
Manufacturing
Our products are manufactured both locally and globally. We carefully select our manufacturing partners to ensure our products are high quality and a fair value.